
T
he ventilation of the electronics housing as well as the atmosperic
pressure compensation for the measuring cell are realised via a
fi
lter
element in the area of the cable gland
.
2
1
2
1
2
1
1
2
F
ig
.
4
:
P
osition of the
fi
lter element
1
F
ilter element
2
B
lind stopper
C
aution
:
D
ue to the
fi
lter e
ff
ect
,
the pressure compensation is time delayed
.
W
hen opening
/
closing the housing cover quickly
,
the measured value
can change for a period of approx
.
5
s by up to
15
mbar
.
I
nformation
:
M
ake sure that the
fi
lter element is always free of buildup during
operation
.
A
high
-
pressure cleaner may not be used for cleaning
.
W
ith instrument versions in protection
IP
66
/
IP
68
,
1
bar
,
the ventilation
is realised via the capillaries in the permanently connected cable
.
T
he
fi
lter element is replaced by a blind stopper
.
4
.
2
M
ounting preparations
F
or the suspension cable version note the following points when
selecting the mounting position
:
l
S
ideways movements of the transmitter can cause measurement
errors
à
T
herefore
,
mount
VEGABAR
67
in a calm area or in a suitable
protective tube
l
T
he suspension cable has a capillary for atmospheric pressure
compensation
V
entilation and pressure
compensation
14
VEGABAR
67
•
4
...
20
m
A
/
HART
-
climate compensated
4
M
ounting
39444
-
EN
-
110916